Howell p



(No Model.)

H. P. TERRY.

SHEAVB FOR PULLEY BLOCKS. No. 412,139. Patented Oct. 1, 1889.

WITf/ESSES: IAN/5mm.-

w By Jill rm ATTORNEYS.

UNITED STATES PATENT EEICE.

HOWELL P. TERRY, OF BROOKLYN, NEXV YORK, ASSIGNOR TO GEORGE RV. BLAIR,OF SAME PLACE.

SH EAVE FOR PU LLEY-BLOQKS.

SPECIFICATION forming part of Letters Patent No. 412,139, dated. October1, 1889. Application filed September 10, 1888. Serial No, 284,966 (Nomodel.)

To all whom it may concern:

Be it known that I, HOWELL P. TERRY, of Brooklyn, in the county of Kingsand State of New York, have invented a new and Improved Sheave forPulley-Blocks, of which the following is a full, clear, and exactdescription.

This invention relates to an improvement in the mounting of pulley-blocksheaves, the object of the invention being to provide a to sheave whichwill operate with a minimum amount of friction, and one which may bequickly and readily repaired should itby any accident happen to get outof order.

The invention consists of certain novelfeatures and combinations ofparts, hereinafter fully described, and pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures and letters of referenceindicate corresponding parts in both views.

Figure 1 is a side view of my improved sheave for pulley-blocks, partsbeing broken away and the block-shaft or pintle being shown in position,but in section; and 2 is a sectional view on line as :0 of Fig. 1, theview being taken from the direction of the arrow shown.

In the drawings, 10 represents a rim, formed with an inner annularrecess 11, and preferably with a grooved peripheral face a. \Vithin therim 10, l mount a number of anti-friction rolls or wheels 14:, whichsaid wheels orrolls are carried by pintles 13, that are mounted in 5rings 12, said rings being arranged outside of the wheels or' rolls 12C. The wheels or rolls lat are so proportioned that they will bearclosely against the inner peripheral face of the rim 10 and against theblock-shaft or pintle 20. In the specific construction illustrated inthe drawings there are six of these anti-friction rolls or wheels, threebeing arranged adjacent to one of the rings 12 and three adjacent to theother ring, the wheels overlapping and breaking joints, so to speak-thatis, being alternately adjacent to opposite sides of the sheave. Afterthe parts have been adjusted as represented in the drawings the sideflanges b 01' the rim 10 will act as guides to steady the wheels 14.

By supporting the pintles 13 by means of rings arranged outside of bothsets of wheels, and by overlapping said wheels, I provide for the use ofmuch larger wheels than could otherwise be employed, and at the sametime I provide for the renewal of any wheel that might happen to bebroken.

Having thus described my invention, I claim new and desire to secure byLetters Patent-' The combination, with a rim formed with an internalannular recess, of rings mounted interiorly thereof, pi ntles extendingfrom ring to ring, and a'roller arranged upon one end of each of saidpintles so as to overlap the rollers on the adjoining pintles,substantially as described.

HOWELL P. TERRY.

Vitn esses:

EDWARD KENT, J12, C. SEDGWICK.

